Power cylinder for internal combustion engines



KELLEY 2,257,417

POWER CYLINDER FOR INTERNAL COMBUSTION ENGINES Filed April 8," 1940 Inventbf fk/WK hf K5415);

A ttorney V Patented Sept. 30, 1941 UNITED STATES PATENT OFFICE rowan C YLIN DER FOR INTERNAL M- BUSTION ENGINES Frank H. Kelley, Cumberland, Md. Application April 8, 1940, Serial No. 328,554

1 .Claim.

This .invention relates broadly to internal combustion engines and more particularly to a power cylinder construction and assembly therefor. i

An fobject of the present invention is to provide a power cylinder, power piston, and cylinder head arrangement having a greater valve capacity for increasing the intake .and exhaust oi the cylinder to the end that maximum power with minimum fuel consumption will result; and whereby less wear and distortion of the cylinder and piston will minimize reboring andreplacement of piston rings.

The invention together with its objects and advantages will be best understood from a study of the following description taken in connection with the accompanying drawing wherein:

Figure l is a. vertical sectional view through a power cylinder and head therefor, with the power piston and intake and exhaust valves shown in elevation.

6 having a working fit therein isof a shape .complementing the said shape of the power cylinder.

However, as shown the cylinder and piston are each formed of flattened sides and rounded ends.' when a number of cylinders is placed ina block the cylinders will extend longitudinally of the block and' they will have their greater diameters parallel to the longitudinal axis of the block and also parallel to the apparent from the following:

A cylinder and piston having the shape contemplated by the present invention will have pproximately the same area' as that of the c nventional round power cylinder and power piston." However, with a cylinder constructed ,in accordance with this invention larger valves I claimed as new is:

can be used than are used with round cylinders and the valve arrangement is more compact than with round cylinders and most of the expanding gasesfare over the piston.

With this greater valve capacity resulting from the shape contemplated by the present invention, the fuel can be drawn into th power cylinder and the exhaust gases discharged therefrom with more rapidity to the end that the revolutions per minute may be increased without resulting in a decrease in efiiciency.

Also, a power cylinder having the design contemplated by the present invention will reduce cylinder distortion because the wear is distributed over a greater area of surface both as regards the wall of the cylinder and the body of the piston.

It will also be found that with a cylinder embodying the features of the present invention airplane engines of the radial type could be equipped with at least one-third more additional cylinders, thus increasing displacement with consequent result of more even flow of power,

better cooling, and reduction of wind resistance.

It will also be understood that a piston and cylinder having a shape contemplated by the present invention will resultin the greater expansion of the piston in the direction of the greater radial dimension of the\ cylinder and piston, thus allowing for greater piston clearance. It is thought that the invention, together with .its advantages, will be clearly appreciated by those skilled in the art from the foregoing, .and

that accordingly a further detailed description thereof is unnecessary Having thus described the invention what is In an engine of the class described, a block having a cylinder therein, said cylinder having flat sides and outwardly bowed ends, acrankshaft below the cylinder, the long diameter of the cylinder being parallel to'the crankshaft,

a piston in the cylinder of the same shape as the cylinder, a rod' connecting the piston with the crankshaft, a head for the block having -a combustion chamber therein of the same shape and size as that of the cylinder, saidhead having inlet and exhaust passages in communication with the. combustion chamber and inlet and outlet valves controlling such passages, said valves being located directly over the piston, the inlet passage having a portion located adjacent and concentricto one.end' of the'combustion chamber, and theexhaust passage having a part located adjacent and concentric to the other end of the combustion chamber, and said combustion chamber forming a continuation of the cylinder.

FRANK H. KELLEY. 

